Apparatus for developing a cylinder



Ap 1969 D. R. CANNON APPARATUS FOR DEVELOPING A CYLINDER Sheet of 5Filed Dec. 2, 1966 INVENTOR. DAVID R. CANNON HlS ATTORNEYS D. R. .CANNONAPPARATUS FOR DEVELOPING A CYLINDER pril 1, 1969 Sheet Filed Dec. 2,1966 m9 m2 N m ON 3 3 mm NAVE NVENTOR.

D R. CANNON wi mm @9 S. H N

"' ATTORNEYS April 1, 1969 D. R. CANNON 3,435,748

APPARATUS FOR DEVELOPING CYLINDER I Sheet 3 ms Filed Dec. 2. 1966 Q mm N7 m 2 s w L I, We IM l l 8 m R D W L 7 mm B A m W m m \G C N N 5 mm Told W T J 4 ml u fl E W. 2 m- B S/ S L H L m 8 B I 8% R I l l 3 HISATTORNEYS April 1969 D. R. CANNON APPARATUS FOR DEVELOPING A CYLINDERSheet 5 of 5 Filed Dec. 2, 1966 FIG FIG

HIS ATTORNEYS United States Patent 3,435,748 APPARATUS FOR DEVELOPING ACYLINDER David R. Cannon, New Albany, Ind., assignor to Reynolds MetalsCompany, Richmond, Va, a corporation Filed Dec. 2, 1966, Ser. No.598,843

Int. Cl. G03d 3/00 US. Cl. 95-89 3 Claims ABSTRACT OF THE DISCLOSURE Anapparatus for developing a gelatine coating on a cylindrical surfacehaving automatic controls for maintaining proper water temperatures inthe developing bath. A vertically movable liquid applying pan is locatedunder the horizontally rotatable cylinder. The pan bottom has athermally sensitive element in a trough. The trough has a slow leak tomaintain a representative liquid surrounding the sensitive element. Astationar tub is located underneath the pan to receive the liquiddrainage and the liquid overflow from the pan. Elevated wells in the tubsurround elevating supporting columns which elevate and lower the pan.Alcohol jets adjacent to the bath spray the cylinder, and liquid fillingpipes fill the pan to maintain a flow of liquid through the pan.

Brief summary of the invention This invention is directed to anapparatus and method of developing a cylinder which has carbon tissuethereon to prepare the cylinder for an etching operation in anotherapparatus.

The apparatus of this invention includes a vertically movable liquidapplying pan over which the cylinder is supported and rotated. Alcoholmay be applied to the cylinder by alcohol spraying jets. A bod of watermay be introduced and circulated in the plan by a water jet manifold inthe pan. The cylinder is partly submerged in the body of water.

The liquid applying pan is vertically movable, and the pan may besufficiently close to the cylinder, so that the cylinder may bepartially submerged in liquid retained in the pan. The pan can belowered, so that it can be placed below the cylinder a suflicientdistance so that the cylinder can be sprayed with liquid alcohol, andsuch liquid may drain from the cylinder, while the cylinder is notsubmerged by liquid in the pan.

Automatic controls are provided for maintaining proper liquidtemperatures in the pan, proper speed of rotation of the cylinder,proper length of treatment, and the like.

Further features of this invention become apparent from thisdescription, the appended claimed subject matter, and the accompanyingdrawings, in which:

FIGURE 1 is a diagrammatic end view of an apparatus embodying featuresof this invention, the view being taken from the left end of FIGURE 2.

FIGURE 2 -is a front view of the apparatus shown in FIGURE 1, such viewbeing taken from the right side of FIGURE 1.

FIGURE 3 is a top portion of a combined wiring diagram, and a partialmechanical diagrammatic showing of parts of the apparatus.

FIGURE 4 is the lower part of the same diagram shown in FIGURE 3,FIGURES 3 and 4 being parts of the same diagram.

FIGURES 5-10 are diagrammatic representations of various stages in thetreatment and development of the cylinder in the apparatus of thisinvention, and are drawn with relatively exaggerated parts to betterillustrate such stages.

Certain words are used in the specification which indi- 3,435,748Patented Apr. 1, 1969 cate relative position, direction, etc. Such wordsare used for the sake of clearness and brevity. However, it is to beunderstood that such words are used only in connection with thedrawings, and that in actual practice the parts so described may haveentirely different relative position, direction, etc. Examples of suchwords are vertical, horizontal, upper, lower, etc.

An entire apparatus, according to this invention is generally designatedby the reference numeral 20. This apparatus is a developing apparatusfor treating a carbon tissue covered cylinder during the developmentstage of intaglio images on such cylinder.

In the production of such cylinders, a camera positive of a finisheddesign is placed in contact with carbon tissue in a vacuum printingframe. A suitable light exposes the tissue through the camera positive.Where there is no dark on the camera positive, the tissue is hardened,and where there is dark on the camera positive, the tissue or carbonremains soft. Gradation of dark will produce gradation of hardness andsoftness in the gelatine of such tissue.

Hardness implies that tissue is relatively insoluble in water. Softnessimplies that tissue is relatively soluble in water.

Carbon tissue as used herein is a historical trade name used for aproduct which originally had a paper backing with a carbon containinglight sensitive layer. However, such product now has a paper backingwith a layer of light sensitive gelatine that hardens with the exposureto light. For example, in FIGURE 5, the layer 22 is a layer of thepaper, and the layer 24 is the light sensitive gelatine, these beingshown in greatly exaggerated size with respect to the cylinder.

The light exposure treatment produces an undeveloped hardness andsoftness image in gelatine. Thereafter, the carbon tissue is applied tothe cylinder, which is a copper plated cylinder. The carbon tissue isadhered to the cylinder by wetting the cylinder with distilled water andthen pressing the carbon tissue on the cylinder with the paper backing22 on the outside and gelatine layer 24 on the inside and adjacent tothe cylinder.

The cylinder so prepared, as is well known in this art, is then ready tobe developed in the apparatus 20 of this invention. In this apparatus20, the paper 22 is first removed by the steps diagrammaticallyindicated in FIG- URES 5, 6- and 7. Thereafter, the gelatine layer 24 isdeveloped, as diagrammatically indicated in FIGURE 8, to remove the softportions of the gelatine, which are soluble in water. Thereafter, thewater is removed by an alcohol treatment, as diagrammatically indicatedin FIG- URE 9, and finally the cylinder is dried by an air blast, asshown in FIGURE 10.

Thereafter, the cylinder may be removed from this apparatus, and may beplaced in an etching apparatus where the cylinder is treated with anacid, which acid is a solution of FeCl;, which removes portions of thecopper plating of the cylinder to produce an intaglio cylinder surface,which is suitable for rotogravure.

The apparatus 20 of this invention is adapted to be substantiallyautomatic in its operation and requires only a very few manuallycontrolled operations. Such manually controlled operations are providedwhere the state of the progress of the operation must be watched andmanually controlled temporarily.

The apparatus 20 may be supported on the strong, rigid frame work madeof angle, channel, or other frame-like members 26 and 26A, which aresecured together rigidly to hold the parts, as it is obvious to thoseskilled in the art.

The frame construction rigidly and stationarily supports a stationarytank which may be a semicylindrical lower tank 28. An upper, verticallymovable arcuate tank or pan 30, is vertically movable within the tank28. The pan 30 may be provided with overflow flanges 32, which permitthe liquid in the pan 30 to overflow, pour or drip from the flanges 32into the lower tank 28.

The lower tank 28 is larger than the upper pan 30. The end walls of thelower tank 28 are indicated at 34 and the end walls of the upper pan 30are indicated at 36. The end walls 36 have overflow flanges also. In atypical apparatus, the tank 28 is approximately 70 inches long and 18inches wide, with the semicylindrical bottom having a nine (9) inchradius. The pan 30 is approximately 7" long and 14" wide at the topoverflow edge.

The pan 30 is rigidly and accurately mounted on supporting columns 38which are slidably held in rigid brackets 40 which are rigidly securedto the transverse frame members 26A of the frame work.

The supporting columns 38 pass through liquid retaining wells 42, whichare welded to the bottom of the tank 28. These columns 38 extendupwardly above the probable highest level 44 of liquid in the tank 28. Adrain 46 is provided in the tank 28, which is of sufficient capacity ofdrain the water fast enough to prevent any higher level thanapproximately 44. The tank is drained of liquid continuously to maintainthe liquid below that level.

The supporting columns 38 are provided with racks or teeth 48 which areengaged by rack gear wheels 50 which are driven by the longitudinalshaft 52. The shaft 52 is driven by a worm gear 54, which is driven by aworm 56. The worm 56 is driven by a shaft 58, which is driven by asprocket wheel 60. This wheel 60 is driven by a chain belt 62 which isdriven by a geared motor '64 which has a sprocket wheel 66, which drivesthe chain belt 62. In the wiring diagram of FIGURES 3 and 4 this motor64 is indicated as M2, for convenience in understanding the wirediagram.

The motor M2, or *64, is an AC motor, and is capable of moving the pan30 up and down between the two dotted line positions shown in FIGURE 1.Such motor M2 may be controlled by a rotary switch 68, also indicated asRS1 in the wiring diagram. This switch 68 may be manually actuated, tocause the motor M2 to raise the pan 30 to the upper position. Such motor64 (M2) may be a reversible motor and may be rotated to move the pan 30downwardly under the control of switch S2 which is normally closed aslong as the pan 30 is in any upper position, but is opened by anyactuating part connected to pan 30, such as column 38, as indicated inFIGURE 3. This may be energized for downward movement of the pan 30 byswitch T2-3 to be elsewhere described.

A cylinder 70, to be developed in apparatus 20, may have a coaxial shaft72. The cylinder 70 may be lowered by a suitable crane, not shown, sothat the ends of the shaft 70 are received in ring bearings 74 which aresupported on end plates 76 at each end of the apparatus 20. The shafts72 may have circular flanges 78, which straddle the ring bearings 74 andprevent the shaft 72 from moving longitudinally along the apparatus 20.

The ring bearings 74 have gears 80, which are driven by gear 82. Thegear 82 is driven by a sprocket wheel 84 which is driven by the chainbelt 86. The chain 86 is driven by a sprocket wheel 88, which is drivenby a DC motor 90, which is also referred to as M1 in the wiring diagram.The speed of rotation of motor 90, and consequently of the cylinder 70,is controlled by the setting of one or both of the manually adjustablepotentiometers 92 and 94, which are also referred to respectively as P1and P2 in the wiring diagram. These potentiometers are adjustableresistances between the AC-DC rectifier 96 and the motor M1. The motorM1 is energized or deenergized by the motor control 98, FIGURE 2, whichis under the control of the timers 101, 102, and 103, which are alsoindicated as T1, T2, and T3 in the wiring diagram of FIGURES 3 and 4.

By a setting of one or both of the potentiometers 92 and 94, the speedof rotation of the motor 90 or M1, can

4 be regulated, whereas the timers 101, 102 and 103, or T1, T2 and T3,regulate the time at which the motor is actuated or stopped andconsequently the time when the cylinder 70 is rotated or stopped.

The cylinder 70 may be sprayed with alcohol from a plurality of nozzles104, which are fed under suitable and regulated pressure from alcoholmanifold 106. Each of the nozzles 104 has a nozzle valve 108. The valves108 may be opened and closed, so that only that part of the cylinder 70is sprayed with alcohol, which part of the cylinder has a tissue 22, 24to be developed in the apparatus 20. It is to be noted, that differentsized cylinders 70, and different sizes of carbon tissues can beprovided on the cylinders 70, and therefore only that part whichcontains the tissues need to be treated. In View of this, the alcoholspray can be limited to that portion of the cylinders requiring thespray, and the correct number of spray valves 108 which provide suchspray need be opened for any particular cylinder treatment. This resultsin a saving of alcohol.

The alcohol manifold 106 is controlled by a solenoid valve 110, which isnormally closed but opens when energized by the proper timer connection,to supply the alcohol to the manifold 106. Such valve 110 is indicatedas SVl in the wiring diagram.

The automatic mixing valve 118 is connected to hot and cold water lines120, and 122 and has a mixed water discharge 124.

Two solenoid water control valves 117 and 119, may be placed in parallelin the water connection 116, with bypass connections as shown, so thatthe amount of water desired may be varied by opening one or both oreither of the valves as is desired. These valves 117 and 119 may besolenoid valves, which are normally closed, but which may be opened whenenergized. These valves also referred to respectively as SVZ, and SV3 inthe wiring diagram.

The mixing valve 118 will have its ratio of hot and cold watercontrolled by the temperature controller regulator 126, which isconnected by the connection 128 to the thermocouple, or thermostaticbulb 130 at the bottom of the pan 30. The connection 128 may be aflexible one which extends from the controller 126, to the thermocoupleor bulb 130. Such connection 128 may pass through another well 132 inthe stationary tank 28, which prevents overflow of water out of tank 28.

The temperature controller regulator 126 may be any well knownregulator, such as can be purchased from the Minneapolis-HoneywellRegulator Company, of Minne apolis, Minn, or from the Foxboro Company,of Foxboro, Mass.

The regulator 126 is also referred to as TCR in the wiring diagram.

The regulator 126 is any well known regulator, which controls the mixingvalve 128 by a compressed air connection 134. Such regulator, has aninking pen or arm 136, which records on a record disc the actualtemperature produced in the device to be controlled, such as the waterin pan 30. Such regulator 126 also has a pointer arm 138, which showsthe temperature desired to be maintained in the regulated device. Suchregulator 126 also has a shaft which drives the record disc that isinserted in the controller 126. A regulator motor CTRM drives the shaft140 when energized by timer switch T2-1.

A temperature controlling cam 142 may be mounted on the shaft 140, torotate with the shaft 140. A cam follower 144 may be biased against thecam 142, to follow such cam as such cam is rotated throughout a cycle ofoperations. An interlocking connection 146 may be provided between thefollower 144, and the pointer arm 138, to regulate the regulator 126 toproduce the temperatures desired to be maintained in the water which isbeing circulated in the pan 30. The thermocouple or bulb 130 responds tothe water temperature in the pan 30, and thus moves the pen arm 136toward or away from the pointer arm 138 in accordance with any departureor plus or minus from the desired temperature selected by pointer arm138. The interlock 146 between the arm 138 and the follower 144determines the temperature to be maintained in the pan 30 as the shaft140 rotates throughout the cycle of operations. In this manner, thedesired temperature is maintained in order to produce the propertemperatures of the water in pan 30, as will become apparent.

An air blast or air current may be directed over the cylinder 70 at theproper time. This may be accomplished by a long air nozzle 148, whichmay extend substantially throughout the length of the apparatus 20, oras far as is required. The air nozzle 148 may be connected by anexpanding duct construction 150 with a blower 152, which may have anatmospheric air intake in the central part, as is usual. Alternatively,such air intake may be connected to a properly regulated air conditionerapparatus, which may maintain the desired temperature of the air intake.The blower 152 may be driven by an AC motor 154, which is also referredto as M3 in the wiring diagram. The air from the blower 152 passesthrough the duct 150 to the nozzle 148, Where the air, at controlledtemperature if desired, is blown over the cylinder 70 to produce thedesired temperature in the cylinder before such cylinder is removed fromthe apparatus 20 to be taken to an etching apparatus where the cylinderis etched to produce an intaglio image on the cylinder.

The various controllable members described herein may be controlled, asis shown in the wiring diagram of FIG- URES 3 and 4.

In the wiring diagram of FIGURES 3 and 4, three timers T1, T2, and T3are shown. These may be of the resetting type, such as made by the EagleSignal Co., of Moline, 111. These are sold under the trade designationas Eagle timers H52A60701; H64A6071, etc. Each one of these timers has atimer motor TIM, T2M, and T3M respectively. These timer motors runcontinuously as long as the main switch 156 of the apparatus is closed.Each timer has an upper timer motor driven shaft 158, which is connectedto a lower timer cam shaft 160 by means of a timer electrical clutchTIC, T2C and T3C respectively. Such clutches may be normally declutchedwhen electrically deenergized, and vice versa. Such timer clutches arenormally deenergized, but are energized, whenever their respectivecontroller relay blades are closed. The timer shaft 160 drives aplurality of control cams, discs, or the like 171, 172, 173, 174, 175,176, 177 and 178 which close or open respectively the normally opentimer switches T1-1, T12, T13; T2-1, T2-2, T23, T2-4; T2-5, T26, T27;and T3-1, T3-2, T3-3, T3-4 and T3-5.

Therefore, when any respective clutch TlC, T2C or T3C of any timer T1,T2 or T3 is energized by the proper relay switch or switch blades in thecircuit diagram, such timer shaft 160 is started to revolve. At thattime, the reset spring 180 is wound by the shaft 160, so that wheneverits corresponding timer clutch is deenergized to release the shaft 160from the shaft 158, then the return spring 180 returns such timer shaft160 to the starting point and sets the timer shaft 160 at the reset orzero position ready to be rotated for the next cycle of operations.

As is usual wiring diagram practice, a relay coil is shown as a circlewith the relay identification in the circle. When such coil is energizedin the circuit, such coil will close or open one or more sets of relayblades or switches. Such blades are shown as two vertical lines with anopen space between them to indicate a normally open switch that closeswhen its relay coil is energized. Other sets of blades are shown asvertical blades with a slanting line joining them. This indicates anormally closed switch that is opened when its relay coil is energized.The blades are identified with the same designation as the relay coil.

The operation as shown in FIGURES 3 and 4 may be started by pushing downstart button SB1, which closes its normally open switch SB1-1. Thisenergizes the coil RA. The operator holds the button SB1 down longenough to energize the coil RA and close the relay blades RA and RA.This energizes clutch TIC and causes shaft 160 to rotate. The coil RAholds the blades RA and RA closed so a holding circuit is produced whichwill maintain the timer T1 shaft 160 in operation until the timer T1solenoid T1C is deenergized by pressing starting button SB2. Startbutton SE2 has a normally closed contact SB21, and a normally opencontact SB2-2. Pushing in of the starter button SE2, opens the switchSB21 to stop the timer T1 shaft 160 which returns to start position, andto energize relay coil RB and thus to close RB blades to energize timerclutch T20 and cause rotation of T2 timer shaft 160, and timer cams171-178. This causes timed closing of T2 timer switches T2Lym and T2-1to T2-7. When switch T23 is closed, relay coil RC is energized to closerelay blades RC and energize T-3 clutch T3C and to start rotation oftimer T3 shaft 160 and cams 171-175 with properly timed closing of timerT3 switches T3-Lyrn and T3-1 to T3-5.

The general operation of the machine 20 under the control of thecircuits shown in FIGURES 3 and 4 is as follows:

Alcohol spray A cylinder 70 is placed on the machine with shaft 72 onring bearings 74. The pan 30 is lifted to upper position by manuallyclosing and opening switch RS1 manual circuit to start and stop panmotor M2. The potentiometers P1 and P2 are adjusted for selected speedof the cylinder 70, depending on its diameter and other characteristics. Start button SB1 is pushed in which energized T1 timer clutchTIC and causes T1 control of switches T11, T12 and T13 to be operated.This causes cylinder 70 to rotate at P1 speed. Alcohol valve SVl isopened by closing of T2.-1 and alcohol is sprayed on the cylinder at 5seconds after start as in FIGURE 5. The alcohol spray is turned off 9seconds after start by opening of T2-1. The purpose is to penetrate thepaper backing 22 of the carbon tissue to render it receptive to thelater water treatment.

Removal of backing 22 At 9 seconds after start switch T1-3 closes andopens water solenoid valves SV2 and SV3 quickly to fill the pan 30 sowater overflows pan 30. The temperature controller cam 142 is stationarywith the follower 144 at F. so that TCR maintains the water in pan 30 at105 F. while cylinder rotates, as in FIGURE 6. The experienced operatornotes when the paper backing 22 starts to loosen and stops drive ofcylinder motor M1 by manually opening a potentiometer switch PS. He thenremoves the paper backing 22 and any frills in the gelatine 24 along theedges of the tissue, as in FIGURE 7. He then closes potentiometer switchPS and restarts rotation of cylinder 70.

Development of tissue When cylinder 70 is restarted, the operator pushesin start button SB2. This opens switch SE24 and closes switch SB2-2.This stops control by timer T1 and starts control by timer T2. T1 timershaft is returned to set position by return spring and T2 shaft 160 isstarted to rotate by T2 clutch T2C. Control by switches T2-Lym and T2-1to T27 is started. T2-Lym establishes a timer T2 shaft 160 holdingcircuit. Switch T2-1 energizes relay R2 which energizes CTR regulatormotor CTRM, cylinder motor M1 at P2 speed and reopens or maintains openWater solenoid valves SV2 and SV3 to maintain a vigorous flow of waterthrough the pan 30. The P2 speed may be faster than the P1 speed. Theregulator cam 142 rotates and causes the follower 144 to set theregulator TCR at 120 F. and to raise the water temperature in the pan 30to such temperature. This continues to 730 seconds after start by T2control.

During rotation of the cylinder 70 in the 120 water, the soft portionsof the gelatine are dissolved to develop an image in the gelatine withvarying degrees of depth of gelatine. This prepares the cylinder foretching in an etching apparatus, as is well known to produce theintaglio image in the cylinder.

At such 730 seconds, the cam 142 sets TCR at 70 and starts to lower thepan water temperature to 70 F. At 740 seconds, switch T2-2 closes andenergizes relay R4 which deenergizes water valve SV3 and reduces thewater flow through pan 30.

At 760 seconds after T2 start, the water temperature in pan 30 has beenreduced to 70, and the cam 142 maintains this temperature for twominutes or until 880 seconds after T2 start. From 880-910 seconds thecam 142 raises the water temperature from 70 to 75, and then maintainsthis 75 temperature until 1250 seconds after T2 start.

This rotation of the cylinder in the 70 and 75 water cools the cylinderto proper temperature for further treatment.

At 1245 seconds, T2-3 closes and starts pan motor M2 to lower pan 30until the pan structure opens low limit switch S2. This is accomplishedby closing of switch T2-3 to connect a reverse circuit in pan motor M2through closed switch S2 which lowers the pan 30 to lowest level whenswitch S2 opens such reverse circuit and stops downward movement of pan30 by motor M2.

Also, T2-3 energizes relay RC which closes the RC 'blades in the T3Cclutch to start rotation of the T3 timer shaft 160 and to start T3controls while both T2 and T3 shafts 160 rotate.

T3Lym closes a holding circuit for T3C clutch to maintain T3 clutchengaged.

At 1250 seconds switch T21 opens and deenergizes relay R2 and stopswater flow at valves SV2 and SV3 and stops cylinder 70 from rotating.

The cylinder 70 is manually turned to place the bare space between theedges of the gelatine downward. The liquid can then drip from the barespace. When dripping action has ceased, then the drops adhering to thebare cylinder are wiped off to prevent such drops from running over thegelatine during subsequent rotation.

The showing of the connections to motor M1 are diagrammatic. Therectifier 96 supplies DC to the manually adjustable resistances P1 andP2. The normally open switch R1, when closed by T1-1, supplies P1current from P1 to M1. The normally open switch R2, when closed by T21,supplies P2 current to M1. The normally open switch RS, when closed byT2-7, supplies P2 current to M1. A return line 97 diagrammaticallyindicates that return current flows back to the potentiometer box and tothe rectifier 96.

At 1300 seconds after the T2 timer was started T2-3 opens the M2circuits for the remainder of the T2 and T3 run of shafts 160.

At 1270 seconds after T2 start, T2-4 closes and energizes relay R1 tocause cylinder motor M1 to rotate at P1 speed. At 1280 seconds T3-1energizes and opens alcohol valve SV1 to produce an alcohol spray until1285 seconds when T3-1 opens and stops such spray. From 1345 seconds to1348 seconds T32 closes and opens to produce another alcohol spray. T3-3produces an alcohol spray from 1400 to 1402 seconds. T34 producesanother alcohol spray from 1460 to 1463 seconds. T3-5 produces anotheralcohol spray from 1510 to 1512 seconds.

At 1535 seconds after start of T2 control T2-4 opens and deenergizes R1and stops drive of the cylinder 70. Also, T3-Ly-m opens and deenergizesT3 clutch T3C so T3 shaft 160 is returned to set position by spring 180.Also, T 2-5 rings a bell 192 until 1540 to warn the operator manually toturn the cylinder 70 with the gap or bare part of the cylinder straightdown. For example, in FIG- URE 9, the cylinder would be slightlyclockwise from the position shown.

At 1595 seconds T2-6 closes and rings bell 192 until 1600 seconds towarn that drops are to be wiped from bare part of cylinder.

At 1620 seconds T2-7 closes and energizes relay R5 which drives cylindermotor M1 at P2 speed and blower motor M3 to blow air over the rotatingcylinder and dry the same. However, if desired, the motor wiring can bechanged to energize the cylinder motor M1 at P1 speed, as is obvious.

At 1912 seconds T27 opens, deenergizes relay R5 and stops the cylindermotor M2 and the blower motor M3.

At 1915 seconds after start of T2 control, the T2-Lym switch opens andstops T2 shaft 160, which is returned to reset position by its spring180.

The cylinder can then be removed from apparatus 20 for etching.

The various continuing lines at the bottom of FIG- URE 3 andcorresponding lines in FIGURE 4 are identified from left to right withconsecutive reference numerals 193-200 to aid in following such linesfrom one figure to the other and vice versa.

It is thus to be seen that a carbon tissue covered cylinder developer 20has been provided comprising: a stationary, elongated, horizontal tank28 having a liquid drain 46 in its bottom and having end walls 34 andside walls as shown; a vertically movable, elongated horizontal pan 30in said tank 28 having overflow edge means or top edges as shown and aslow bottom drain means or perforated drain trough groove in the bottomof the pan 30 discharging liquid in said tank; pan vertical moving means38, etc., for elevating and lowering said pan 30 in said tank; a panmotor M2 operating said pan vertical moving means; a stationary alcoholmanifold 106 above and along the length and one side of said tank 28with a plurality of alcohol nozzles 104 directed into said tank 28 andalong the length of said tank 28; an alcohol solenoid valve SV1controlling the flow of alcohol into said alcohol manifold 106; anelongated air nozzle 148 above and along the length and one side of saidtank 28; an air blower 152 connected to said nozzle 148; an air blowermotor M3 driving said air blower 152; a water manifold 112 in andcarried by said pan 30 and having a plurality of water jets 114 alongthe length of said pan 30; a hot and cold Water automatic mixing valvemeans 118 with a mixed water connection 124 to said water manifold 112and having a mixed hot and cold water ratio control means therein; awater temperature sensing member 130 sensing the temperature of water insaid pan 30; a temperature control regulator means 126 having a desiredtemperature pointer 136, a sensed temperature indicator 138 responsiveto the water temperature sensed by said sensing member and automaticmeans in said regulator and connected to said mixing valve 118 tocontrol said ratio control means to maintain said desired temperature ofthe water in said pan 30; a regulator time shaft 140 in said regulator126 with a timing cam 142 moving said pointer 138 to desired positionsat various time sequences; solenoid water valve means SV2 and SV3regulating the flow of water in said mixed water connection 124;cylinder shaft rotatable supports 74, 74 supported by plates 76 adjacentthe tops of said tank end walls 34 for rotatably supporting a horizontalcylinder 70 partly within said tank 28; a cylinder motor M1 rotatingsaid rotatable supports 74, 74; speed rotation control means P1 and P2for said cylinder motor M1; a manual pan motor control means 68 forelevating said pan 30; a solenoid operated normally open pan motorswitch means RS1 for lowering said pan with means to open said switchwhen said pan is lowered to its low limit; timer means T1, T2 and T3with means sequentially to control said solenoid pan motor switch RS1 tolower said pan 30 to its lowest position, to control said alcohol valveSV1 to spray said cylinder 70 with alcohol when said pan 30 is lowered,to control said air blower motor M3, to control said solenoid watervalve means SV2 and SV3 to regulate the flow of water to said watermanifold 112, to control said cylinder motor M1; and push or startbutton means SB1 and SB2 to manually regulate said timer means.

These members or means cooperate to produce the sequences heretoforedescribed to take place at certain time intervals identified in secondsof time.

The cylinder motor M1 may be a reversible motor with a reversing meansand reversing switch, not shown. The direction of rotation of the motorM1 and the cylinder 70 driven thereby may be chosen in either directionby the setting of such reversing switch.

While the form of the invention now preferred has been disclosed asrequired by statute, other forms may be used, all coming within thescope of the claimed subject matter which follows.

What is claimed is:

1. A carbon tissue covered cylinder developer comprising:

a stationary, elongated, horizontal tank having a liquid drain in itsbottom and having end walls and side walls;

a vertically movable elongated horizontal pan in said tank havingoverflow edge means and a slow bottom drain means discharging in saidtank;

vertical moving means for elevating and lowering said pan in said tank;

a pan motor operating said vertical moving means;

a stationary alcohol manifold above and along the length and one side ofsaid tank with a plurality of alcohol nozzles directed into said tankand along the length of said tank;

an alcohol solenoid valve controlling the flow of alcohol into saidalcohol manifold;

an elongated air nozzle above and along the length and one side of saidtank;

an air blower connected to said nozzle;

an air blower motor driving said air blower;

a Water manifold in and carried by said pan and having a plurality ofwater jets along the length of said pan;

a hot and cold water automatic mixing valve means with a mixed waterconnection to said water manifold and having a mixed hot and cold waterratio control means;

a water temperature sensing member sensing the temperature of water insaid pan;

a temperature control regulator means having a desired temperaturepointer, a sensed temperature indicator responsive to the watertemperature sensed by said sensing member, and automatic means in saidregulator and connected to said mixing valve to control said ratiocontrol means to maintain said desired temperature of the water in saidpan;

a regulator time shaft in said regulator with a timing cam moving saidpointer to desired positions at various time sequences;

solenoid water valve means regulating the flow of water in said mixedwater connection;

cylinder shaft rotatable supports supported adjacent the tops of saidtank end Walls for rotatably supporting a horizontal cylinder partlywithin said tank;

a cylinder motor rotating said rotatable supports;

speed rotation control means for said cylinder motor;

a manual pan motor control means for elevating said a solenoid operatednormally open pan motor switch means for lowering said pan with means toopen said switch means when said pan is lowered to its low limit;

timer means with means sequentially to control said solenoid pan motorswitch to lower said pan to its lowest position, to control said alcoholvalve to spray said cylinder with alcohol when said pan is lowered, tocontrol said air blower motor, to control said solenoid water valvemeans to regulate the flow of water to said water manifold, to controlsaid cylinder motor;

and push button means to manually regulate said timer means.

2. A developer according to claim 1 wherein said push button means andsaid manual pan motor control means are operable by an operator tocause, with said timer means, a carbon tissue covered cylinder to rotatewith said pan in upper position and to be sprayed with alcoholsufficiently to prepare the paper backing of said carbon tissue forwater treatment and then to introduce water at a warm temperature tofill and overflow said pan and to loosen said paper backing, then tomanually stop rotation of said cylinder to manually remove said paperbacking and remove frills from the gelatine of said tissue.

3. A developer according to claim 2 in which said push button means isthen operable to cause said timing means to cause said cam means toraise the temperature of water and increase the volume of water flowingover and through said pan to a gelatine layer developing temperature fora sufiicient time to develop any hardness and softness image on saidgelatine layer, then to lower the temperature of water flowing over andthrough in said pan to a cooling temperature for a suflicient time tocool said cylinder substantially to room temperature, then automaticallyto stop water flow to said pan and to stop rotation of said cylinder soit may drip free of surplus water and to cause said timing means tolower said pan and to cause said cylinder to rotate and to cause alcoholspray to be applied to said cylinder repeatedly during a timed periodand to stop rotation of said cylinder, and produce a signal to informthe operator manually to turn the cylinder with its bare gap down andafter sufficient time to produce another signal to remove alcohol drips,then automatically to rotate said cylinder and blow air from said airnozzle a sufiicient time to dry said cylinder and then to stop rotationof said cylinder and blowing of air from said nozzle.

References Cited UNITED STATES PATENTS 1,381,222 6/1921 Paulson et a1.93 3,088,391 5/1963 Sigler 95-93 3,183,819 5/1965 Gordon 95-89 3,187,6596/1965 Edens et a1 95-89 3,354,807 11/1967 Horner 9589 XR NORTON ANSHER,Primary Examiner. FRED L. BRAUN, Assistant Examiner.

U.S. Cl. X.R. 118-9

